EP 1197747 A1 20020417 - ION CONCENTRATION METER
Title (en)
ION CONCENTRATION METER
Title (de)
VORRICHTUNG ZUR MESSUNG DER IONENKONZENTRATION
Title (fr)
DISPOSITIF MESURANT LA CONCENTRATION IONIQUE
Publication
Application
Priority
- JP 0102575 W 20010328
- JP 2000093850 A 20000330
Abstract (en)
Two conductivity measuring cells each having at least two electrodes are arranged in series in a flow path of a sample to be measured so that the sample may make contact with the cells in sequence. A difference conductivity meter produces the difference between the signals themselves detected by the conductivity cells as the difference in conductivity of the sample between the positions of the conductivity measuring cells. Based on the predetermined correlation between the change in conductivity of the sample and the change in concentration of the ion of interest in the sample, an ion concentration meter thus constructed derives the change in ion concentration of the sample from the output from the difference conductivity meter. The ion concentration meter can measure a minute change in ion concentration, such as of ammonia, with extremely high accuracy and sensitivity, while carrying out continuous measurement. <IMAGE>
IPC 1-7
IPC 8 full level
G01N 27/02 (2006.01); G01N 27/06 (2006.01)
CPC (source: EP KR US)
G01N 27/021 (2013.01 - EP US); G01N 27/06 (2013.01 - EP KR US)
Citation (search report)
See references of WO 0175428A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1197747 A1 20020417; AU 4459301 A 20011015; CN 1193224 C 20050316; CN 1380973 A 20021120; KR 100722888 B1 20070530; KR 20020028886 A 20020417; TW 498159 B 20020811; US 2002158635 A1 20021031; US 6646443 B2 20031111; WO 0175428 A1 20011011
DOCDB simple family (application)
EP 01917553 A 20010328; AU 4459301 A 20010328; CN 01801527 A 20010328; JP 0102575 W 20010328; KR 20017015305 A 20011129; TW 90107691 A 20010330; US 98004801 A 20011128